M濟部中央標準局員工消费合作社印裝 4228 0 9 A7 _____B7_______ 五、發明説明（1 ) 技術範圍 本發明係關於具有安裝於—臂之拾取輥之紙及其他介質 之進饋機’及關於臂之彈跳阻尼作用。 發明之背景 讓與本發明之受讓人之Padget等人之美國專利5,527,026描 示一種紙進饋機構，其中各拾取輥由安裝在一臂之齒輪 系驅動，臂可環繞齒輪系之從動齒輪之中心自由樞動。 此—結構自動施加逐漸増加之力於拾取輥，其至拾取輥 移動後，此時向下壓力自動解除。 採用上述結構時’重紙在被進饋時抬升齒輪系，因而導 致齒輪系在紙或其他介質脫離驅動輥時，在重力影響下 掉落。此一情況導致驅動輥及因而齒輪系彈跳而減緩可 罪操作。本發明係關於一種增加大為限制抬升運動及減 慢掉落至紙疊上之阻尼機構。 發明之概要 根據本發明’具有拾取齒輪系之一托架，其係固定於第 一彈簧之端部’第一彈簧係依托架移離介質盤時張開之 方向纏繞。此彈簧缠在一心料之第—圓柱形部份上’及 心軸安裝成在位於齒輪系樞動軸線上之一軸上旋轉。第 二彈簧依托架移離介質盤時閉合之方向纏繞於心軸之第 二圓柱形部份第二彈簧之端部固定於—固定框架^第 一彈簧對心軸具有遠較第二彈簧為緊之抓持力。 知:作中，當傳動系之從動齒輪被操縱使拾取輥抵靠介質 疊頂部而拾取紙張時，向下運動係最小的，且第二彈黃 本紙張尺度適用中國國家標準_ ( CNS ) A4規格（2丨0X297公楚） 11111 I I I I I 訂 I ! 1 成 (請先聞讀背面之注項再填寫本頁) 4228 0 9 Α7 Β7 五、發明説明（2 ) 之摩擦力亦較低，纟第一及第二彈簧之影響不顯著。紙 移離疊時，齒輪系之向下力自動解除。齒 π 動使第二彈簧纏緊心軸’因而抓持心軸及使二軸隨齒輪 系之旋轉運動而旋轉。如果紙張較硬，_向上力加於齒 輪系，但向上運動被第一彈簧之高摩擦力抗阻而限制其 向上運動此一情況容許介質較平順地移離。 此向上運動後，當介質移動通過傳動輥時’齒輪系無任 何支撐。然後齒輪系將在重力影響下返回至盤^向下運 動將弟一彈簧纏緊在心軸上’因而抓持心軸及使心轴隨 齒輪系之旋轉運動而旋轉。此向下運動張開第二彈脊對 心軸之抓持’容許心軸在第二彈簧上滑動。於本發明所 揭示之具體實例中’第二彈簧在心軸上之輕摩擦抓持產 生相對較低之摩擦力，此較低摩擦力適度阻尼向下運動 而減少彈跳。低摩擦力為有利者，因齒輪系亦被一彈簧 配衡。傳動輥因而遠較如果彈跳不受阻尼時為迅速地沉 降而驅動介質。 向下摩擦力不明顯時，可採用纏繞一固定軸之一單獨彈 簧，如就第一彈簧所說明在向上運動時纏緊放鬆而發揮 功能。 圖式之簡單說明 本發明將參照附圖加以說明。 圖1為受阻尼拾取臂之頂部透視圖，臂位於下方停靠在一 疊紙上。 圖2為圖1之同一構型之底視圖。 -5- 本紙法尺度適用中國國家標準（CNS ) Α4規格（210Χ 297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· 訂 Μ濟部中央樣準局I工消費合作杜印策 4228 0 9 A7 B7 五、發明説明（3 ) 圖3顯示彈簧及心軸。 圖4為臂被進饋中硬抬升之底視圖 /圖5顯示齒輪系之各齒輪。 \L 要元件代表符號 社濟部中央標嗥局員工消费合作社印製 1 托架 la 延伸部份 3a 傳動輥 3b 傳動輥 5 紙或介質 7 盤 9 軸 11 固定機架 13 盤簧 15 心抽 15a 中心孔 15b 左側圓柱形部份 15c 右側圓柱形部份 15d 中心脊線 17 彈簧 19 彈簧 21 電動機 23 齒輪 25 齒輪 31 從動齒輪 -6- 本纸張尺度適用中國國家標率（CNS ) Α4規格（2!ΟΧ297公釐） --------种衣------ΐτ------^ (請先閲讀背面之注意事項再填寫本頁) 422809 A7 B7 經濟部中央樣準局員工消費合作社印製 五、發明説明（4) 33 驅動齒輪 35 齒輪 37 齒輪 39 齒輪 41 齒輪 實施發明之最佳模式 如圖1所示，包含一齒輪系（示於圖5 )之托架！，驅動對稱 之傳動輥3a、3b ’傳動輥3a、3b接觸一疊紙或其他介質5之 項部紙5位於扁平盤7上’盤7可為固定或可加高而容納 大疊介質5。托架1安裝成就一從動齒輪枢動，如前述美 國專利5,527,026所說明。軸9安於固定機架η中且與托架【 之樞動點共軸。 盤簧13連接於托架1與機架11之間，以提供對托架i之 向上配衡力’然而配衡並不克服重力，因此，托架1之妹 構在重力下以彈簧13之力所減小而得之加速度降落，直 至輥3a、3b遭遇紙5。 圖1之拆開邵份顯示心抽15，心軸具有總繞在其接近托 架1 一侧之彈簧19，以及纏繞在其遠離托架1 一側之彈箸 17。如圖2所清晰顯示，彈簧19之一端固定於托架1之延 伸部份la，而彈簧17之一端固定於機架11 a圖2顯示附著 於機架11之電動機21，電動機2 1驅動托架1中齒輪系之— 系列齒輪（僅示有齒輪23及25 )。 圖3以分解關係詳細顯示心袖15及安裝於其上之彈簧17 及19。心軸15具有接近但不緊密配合而容納軸9之中心孔 本紙張尺度適用中國國家標隼（CNS ) Α4規格（210X 297公f ) --------ΐ衣------、1Τ-------^ (讀先聞讀背面之注意事項再填寫本頁) Α7 422θ〇9 Β7 五、發明说明（5 ) 15a。心軸15具有一左側圓柱形部份15b，一右側圓柱形部 份15c及一中心脊線i5d。此具體實例中，圓柱部份15b及 15c直徑相同。此具體實例中之彈簧17及19為相同材料及 斷面。然而，彈簧17被部份15c鬆弛固定（具體言之，心抽 部份15c之外徑為14.17 mm，彈簧丨7之内經為14.08 mm)。彈 簧19被部份15b遠為緊密地固定（具體言之，心軸部份15c 之外徑亦為14.17 mm及彈簧I7之内徑為13.75 mm)。 圖4為顯示托架1被向上移離介質5時之總成之底視圖。 此一情況傾向在硬紙或其他介質進饋時發生，在進領過 程中’進饋介質5被托架丨下游之進饋輥或其他類似裝置 (圖中未示）抓持，施加充分之移動力於介質5而向上抬开 托架1。比較圖1與圖5顯示彈簧19因向上運動鬆開至圖4 之位置。向上運動以標準彈簧離合器之方式纏緊彈簧 Π ’使心軸15隨托架1移動。彈簧19之鬆開作用使彈簧19 環繞心軸滑動，及因彈簧19係緊密纏繞於心軸丨5，故摩 擦力較高。托架1向上移動’但係成一受彈簧19之摩擦力 限制之量。 當介質5被移動時’托架丨將被介質5固定，然後托架1 將在重力影響下向下移動至盤7 °此項運動將依標準彈黃 離合器之方式纏緊彈簧丨9 °纏緊之彈簧19將抓持心軸15 及迫使其隨托架1旋轉。彈簧17係輕纏繞在心軸15上，弹 簧17在心軸15上之摩擦阻力將為中度’因而阻尼托架1之 運動，且縮短托架I沉降之時間，而可同時饋送另一介質 5。中度摩擦力為適宜者’因托架1係由彈簧π配衡，而 -8- _____________—_____________^ 本纸張尺度咖巾關I：料（CNS ) Μ規格（210X^7公釐） (請先閲讀背面之注意事項存填寫本育) 装. 订 經濟部中央橾华局員工消费合作杜印製 A228 0 9 A7 -------B7 五、發明説明（6 ) 彈簧13亦延緩托架1之向下運動。 圖5顯示除去托架〗之—邊壁後之托架1中的齒輪。從動 齒輪31由電動機21經齒輪25予以驅動，並以軸頸方式安 裝於軸9上。齒輪系包括驅動齒輪汩之齒輪3丨。齒輪幻驅 動齒輪35。齒輪35驅動齒輪37。齒輪37驅動齒輪39及齒 輪39驅動齒輪41，齒輪41驅動輥3a及3b。（輥3a及3b經由 一單向離合器被驅動’以當下游輥以較輥3a及3b之從動 速度為高移動介質5時自由移動。） 將明暸’其上纏繞彈黃丨7及19之心轴15之各部份之直徑 可不同，或彈簧17及19之組成或斷面可不同，因基本設 計特點，因彈簧Π提供（限制）齒輪系向下運動之充分摩 擦力及彈簧丨9提供限制齒輪系向上運動之明顯摩擦力， 同時彈簧丨7及19在各彈簧丨7或19被纏緊時，應有效抓持 並轉動心抽1 5。 亦將明暸，如果認為彈簧17之向下限制作用無必要時， 彈簧17可用一單向棘輪機構代替。彈簧17及19之端部亦 可緊密纏繞於固定延伸部份而非將彈簧端部配置於孔 中"本發明可有與所說明之符合或可預期之其他變化。 ---1------¾衣------1T---^----^ (锖先閱讀背面之注意事項再填寫本頁) *f濟郎中央標隼局員Η消費合作杜印裝 本紙張尺度適用中國國家橾孪（CNS ) A4规格（210X 297公t )Printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 4228 0 9 A7 _____B7_______ V. Description of the Invention (1) Technical Scope The present invention relates to a feeder for paper and other media having a pickup roller mounted on the arm and the The bounce damping effect. BACKGROUND OF THE INVENTION US Patent 5,527,026 to Padget et al., Assignee of the present invention, describes a paper feed mechanism in which each pickup roller is driven by a gear train mounted on an arm, and the arm can surround the driven gear of the gear train The center of it is free to pivot. This—the structure automatically applies a gradually increasing force to the pick-up roller, and when the pick-up roller moves, the downward pressure is automatically released at this time. With the above structure, the 'heavy paper' lifts the gear train when being fed, which causes the gear train to fall under the influence of gravity when the paper or other medium leaves the driving roller. This situation causes the drive rollers and thus the gear train to bounce and slow down the guilty operation. The present invention relates to a damping mechanism that greatly increases the lifting movement and slows down falling on the paper stack. SUMMARY OF THE INVENTION According to the present invention, 'a bracket having a pickup gear train fixed to an end portion of a first spring', the first spring is wound in a direction in which the bracket is opened when the bracket is removed from the media tray. This spring is wound on the first-cylindrical portion of the core material and the mandrel is mounted to rotate on a shaft located on the pivot axis of the gear train. The second spring is wound around the second cylindrical portion of the mandrel in the closing direction when the bracket is removed from the media tray. The end of the second spring is fixed to the fixed frame. The first spring has a much tighter to the mandrel than the second spring. Holding power. Known: When the driven gear of the drive train is manipulated so that the pickup roller abuts against the top of the media stack to pick up the paper, the downward movement is the smallest, and the second paper size of the yellow paper is applicable to Chinese national standards_ (CNS) A4 specifications (2 丨 0X297) Chu 11111 IIIII I! 1% (please read the notes on the back before filling this page) 4228 0 9 Α7 Β7 5. The friction of the invention description (2) is also low, 纟The effects of the first and second springs are not significant. When the paper is removed from the stack, the downward force of the gear train is automatically released. The tooth π causes the second spring to entangle the mandrel ′, thereby grasping the mandrel and rotating the two shafts with the rotation of the gear train. If the paper is stiff, upward force is added to the gear train, but the upward movement is resisted by the high friction force of the first spring, which limits its upward movement. This situation allows the medium to move more smoothly away. After this upward movement, the 'gear train has no support as the medium moves through the drive roller. Then the gear train will return to the disk under the influence of gravity and move the spring to the mandrel 'so that it grasps the mandrel and rotates the mandrel with the rotation of the gear train. This downward movement opens the grasp of the mandrel by the second ridge ' to allow the mandrel to slide on the second spring. In the specific example disclosed in the present invention, the light friction grip of the second spring on the mandrel produces a relatively low frictional force. This lower frictional force moderately dampens downward movement and reduces bouncing. Low friction is advantageous because the gear train is also counterbalanced by a spring. The drive roller is therefore much more powerful than the medium that drives the rapid fall if the bounce is not damped. When the downward friction force is not obvious, a separate spring wound around a fixed shaft may be used, and as described in the first spring, it will be tightly loosened and function when it moves upward. Brief description of the drawings The present invention will be explained with reference to the drawings. Figure 1 is a top perspective view of a damped pickup arm, with the arm resting on a stack of paper below. FIG. 2 is a bottom view of the same configuration of FIG. 1. -5- The size of the paper method is applicable to the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) (Please read the precautions on the back before filling out this page) Policy 4228 0 9 A7 B7 V. Description of the invention (3) Figure 3 shows the spring and the mandrel. Figure 4 is a bottom view of the arm being lifted hard while being fed / Figure 5 shows the gears of a gear train. \ L Main component representative symbol Printed by the Consumers' Cooperative of the Central Bureau of Standards of the Ministry of Social Affairs 1 Bracket la Extension 3a Drive roller 3b Drive roller 5 Paper or media 7 Disc 9 Shaft 11 Fixed frame 13 Coil spring 15 Heart pump 15a Center hole 15b Left cylindrical portion 15c Right cylindrical portion 15d Center ridge line 17 Spring 19 Spring 21 Motor 23 Gear 25 Gear 31 Driven gear-6- This paper size applies to China National Standards (CNS) Α4 specifications ( 2! 〇Χ297mm) -------- seed coat -------- ΐτ ------ ^ (Please read the precautions on the back before filling this page) 422809 A7 B7 Central Ministry of Economic Affairs Printed by the quasi-station employee consumer cooperative V. Description of the invention (4) 33 Driving gear 35 Gear 37 Gear 39 Gear 41 Gear The best mode for implementing the invention is shown in Figure 1, which includes a bracket for a gear train (shown in Figure 5) !! Driven symmetrical driving rollers 3a, 3b. The driving rollers 3a, 3b are in contact with a stack of paper or other media 5 and the top sheet 5 is located on a flat disk 7. The disk 7 may be fixed or may be raised to accommodate a large stack of media 5. The mounting of the bracket 1 enables pivoting of the driven gear, as described in the aforementioned U.S. Patent 5,527,026. The shaft 9 is mounted in the fixed frame η and is coaxial with the pivot point of the bracket [. The coil spring 13 is connected between the bracket 1 and the frame 11 to provide an upward balance force to the bracket i. However, the balance does not overcome gravity. Therefore, the sister of the bracket 1 is constructed by the spring 13 The acceleration resulting from the reduction in force drops until the rollers 3a, 3b encounter the paper 5. The disassembly shown in Fig. 1 shows a heart pump 15, the mandrel has a spring 19 that is always wound on the side close to the bracket 1, and a spring 17 that is wound on the side away from the bracket 1. As clearly shown in FIG. 2, one end of the spring 19 is fixed to the extension portion la of the bracket 1, and one end of the spring 17 is fixed to the frame 11 a. FIG. 2 shows a motor 21 attached to the frame 11 and the motor 21 drives the bracket. The gear train in Frame 1 is a series of gears (only gears 23 and 25 are shown). FIG. 3 shows the heart sleeve 15 and the springs 17 and 19 mounted on it in detail in an exploded relationship. The mandrel 15 has a central hole that is close to but does not fit tightly to accommodate the shaft 9. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 male f) -------- ΐ 衣 ----- -、 1Τ ------- ^ (Read the notes on the back first and then fill out this page) Α7 422θ〇9 Β7 5. Description of the invention (5) 15a. The mandrel 15 has a left cylindrical portion 15b, a right cylindrical portion 15c, and a center ridge line i5d. In this specific example, the cylindrical portions 15b and 15c have the same diameter. The springs 17 and 19 in this specific example are of the same material and section. However, the spring 17 is loosely fixed by the portion 15c (specifically, the outer diameter of the heart pumping portion 15c is 14.17 mm, and the inner diameter of the spring 7 is 14.08 mm). The spring 19 is far tightly fixed by the portion 15b (specifically, the outer diameter of the mandrel portion 15c is also 14.17 mm and the inner diameter of the spring I7 is 13.75 mm). FIG. 4 is a bottom view showing the assembly when the carriage 1 is moved upward from the medium 5. This situation tends to occur when feeding hard paper or other media. During the feeding process, the 'feed media 5' is held by a tray 丨 downstream feed roller or other similar device (not shown), and fully applied. The moving force is on the medium 5 to lift the tray 1 upward. Comparing FIG. 1 with FIG. 5 shows that the spring 19 is released to the position of FIG. 4 due to the upward movement. The upward movement tightens the spring Π 'in the manner of a standard spring clutch to move the mandrel 15 with the carriage 1. The loosening effect of the spring 19 causes the spring 19 to slide around the mandrel, and because the spring 19 is tightly wound around the mandrel 5, the frictional force is high. The carriage 1 is moved upward 'but in an amount restricted by the frictional force of the spring 19. When the medium 5 is moved, the 'bracket 丨 will be fixed by the medium 5, and then the bracket 1 will be moved down to the disc 7 under the influence of gravity. This movement will tighten the spring according to the standard elastic yellow clutch. The tight spring 19 will grip the mandrel 15 and force it to rotate with the carriage 1. The spring 17 is lightly wound on the mandrel 15. The frictional resistance of the spring 17 on the mandrel 15 will be moderate ', so that the movement of the carriage 1 is damped, and the time for the carriage I to settle is shortened, while another medium 5 can be fed at the same time. Moderate friction is suitable, because the bracket 1 is balanced by the spring π, and -8- _________________________ This paper size coffee towels I: material (CNS) M specifications (210X ^ 7 mm) ( Please read the precautions on the back and fill in this education first) Pack. Ordered by the Central China Economic and Trade Bureau, Ministry of Economic Affairs, Consumer Cooperation Du printed A228 0 9 A7 ------- B7 V. Description of the invention (6) Spring 13 is also postponed The carriage 1 moves downward. Fig. 5 shows the gears in the bracket 1 after the side wall is removed-the side wall. The driven gear 31 is driven by a motor 21 via a gear 25, and is mounted on the shaft 9 in a journal manner. The gear train includes a gear 3 丨 that drives a gear 汩. The gear phantom drives the gear 35. The gear 35 drives the gear 37. The gear 37 drives the gear 39 and the gear 39 drives the gear 41, and the gear 41 drives the rollers 3a and 3b. (Rolls 3a and 3b are driven through a one-way clutch to 'freely move when the downstream roll moves the medium 5 at a higher speed than the driven speed of the rolls 3a and 3b.' The diameter of each part of the mandrel 15 may be different, or the composition or cross-section of the springs 17 and 19 may be different. Due to the basic design characteristics, the spring Π provides (limits) the sufficient friction of the downward movement of the gear train and the spring 丨 9 Provide obvious friction to limit the upward movement of the gear train. At the same time, when the springs 7 and 19 are entangled, they should effectively hold and rotate the heart pump 15. It will also be clear that if the downward limiting effect of the spring 17 is deemed unnecessary, the spring 17 may be replaced by a one-way ratchet mechanism. The ends of the springs 17 and 19 can also be tightly wound around the fixed extension instead of having the spring ends in the holes. "The invention may have other variations that are consistent with or anticipated from the description. --- 1 ------ ¾ clothing ------ 1T --- ^ ---- ^ (锖 Please read the precautions on the back before filling in this page) * f Jilang Central Standard Bureau Bureau MemberΗ Consumption cooperation Du Duan paper size applicable to China National Twin (CNS) A4 specification (210X 297g t)